Data Binding

There are two types XML data binding and UI data binding. It's a technique that binds data with the backend/ability to access and retrieve that data...I guess you can call it logic. Any change in the data will be reflected in the element bound to that data.

Examples of UI binding: WPF, Cocoa with nibs and variables

UI elements are tied to a variable. Data changes to that variable will be reflected in the UI element immediately. This can be implemented using event triggers or notification/Observer pattern.

Example of XML binding: SOAP
An object is used to represent the XML data. One would access the object to see retrieve data about the XML.